13871628545 has 8 divisors (see below), whose sum is σ = 16648391400. Its totient is φ = 11095678080.

The previous prime is 13871628541. The next prime is 13871628553. The reversal of 13871628545 is 54582617831.

It can be written as a sum of positive squares in 4 ways, for example, as 7569174001 + 6302454544 = 87001^2 + 79388^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13871628545 - 2² = 13871628541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13871628493 and 13871628502.

It is not an unprimeable number, because it can be changed into a prime (13871628541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164876 + ... + 234365.

It is an arithmetic number, because the mean of its divisors is an integer number (2081048925).

Almost surely, 2^13871628545 is an apocalyptic number.

It is an amenable number.

13871628545 is a deficient number, since it is larger than the sum of its proper divisors (2776762855).

13871628545 is an equidigital number, since it uses as much as digits as its factorization.

13871628545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406195.

The product of its digits is 1612800, while the sum is 50.

The spelling of 13871628545 in words is "thirteen billion, eight hundred seventy-one million, six hundred twenty-eight thousand, five hundred forty-five".